The Free and Equal Elections Foundation said registered viewers from the first debate will select two candidates to take part in the second event, The Washington Post reported Wednesday.
Tuesday night's first debate in Chicago, carried on Ora TV's You Tube channel, featured Rocky Anderson of the Justice Party, Virgil Goode of the Constitution Party, Libertarian Gary Johnson and Jill Stein of the Green Party.
Former CNN host Larry King was the moderator, but it wasn't known who will serve in that role for the second debate, the Post said. It is to be streamed at www.freeandequal.org/live and through other, yet-to-be-announced media outlets.
In the first debate, Anderson, Johnson and Stein expressed support for legalizing marijuana to varying degrees, the Post said. Goode opposed it.
The New York Times reported Johnson noted he had smoked marijuana and drank alcohol in the past but no longer uses either. "The drug problem is prohibition-related, not use-related," he said.
Stein said "the most serious health impact from marijuana is the illegal drug trade," the Times said, while Anderson said drug offenders not convicted of another crime don't belong in prison.
Goode said he would leave it to states to decide and would cut federal funding drug enforcement for economic reasons.
The Times said all four agreed U.S. military spending should be cut.
Anderson called the National Defense Authorization Act, which allows indefinite military detention without charges being brought, "the very definition of tyranny." The Times said the other candidates didn't argue his point.
Goode said the United States "should stop trying to be the overseer of the world," and Johnson said he would cut defense spending by 43 percent and Stein said she would outlaw drone strikes.
Stein proposed free college for everyone, but Johnson said he'd do away with federal college loans.
Goode said the United States should stop issuing green cards until the jobless rate falls below 5 percent.